Behind the Scenes with Marc Krebs and the 6.5 Grendel

Published on June 27, 2011
Duration: 7:52

This guide details how to enhance the accuracy of AK-platform rifles, drawing from insights provided by Marc Krebs of Krebs Custom. It covers critical modifications such as installing custom gas systems, free-floated handguards, and two-stage triggers. The process emphasizes meticulous attention to detail and testing with quality ammunition to achieve sub-MOA accuracy, as demonstrated with various prototypes including the 6.5 Grendel AK and Saiga variants.

Quick Summary

Marc Krebs showcases custom AK prototypes, including a 6.5 Grendel AK and Saiga variants in .308 and .223. Key modifications for accuracy include custom gas systems, free-floated handguards, and two-stage triggers. The 6.5 Grendel AK and Saiga .223 demonstrated sub-MOA accuracy potential, highlighting significant improvements over standard platforms.

Chapters

  1. 00:09Introducing Marc Krebs Prototypes
  2. 00:266.5 Grendel AK Accuracy & Development
  3. 00:45New Prototype Calibers
  4. 01:136.5 Grendel AK Modifications
  5. 01:41Shooting 6.5 Grendel AK
  6. 02:27Two-Stage Trigger System
  7. 02:38Praising the 6.5 Grendel AK
  8. 03:076.5 Grendel AK Accuracy Test
  9. 03:25Saiga .308 Prototype Overview
  10. 04:05Shooting Saiga .308 Prototype
  11. 04:54Saiga .223 Prototype Overview & Accuracy
  12. 05:24Shooting Saiga .223 Prototype
  13. 05:49Saiga Prototypes Comparison & Conclusion
  14. 06:27Future of Prototypes

Frequently Asked Questions

What modifications were made to the 6.5 Grendel AK prototype?

The 6.5 Grendel AK prototype featured a custom gas system, a free-floated handguard (wood and metal shroud), a modified stock, and a two-stage trigger system to enhance its accuracy and performance.

How accurate were the Saiga prototype rifles?

The Saiga .223 prototype demonstrated sub-MOA accuracy with Federal 69 grain match ammunition. The 6.5 Grendel AK also showed excellent accuracy potential, achieving a tight 4-round group at 50 yards.

What is a free-floated handguard and why is it important for accuracy?

A free-floated handguard is one that does not contact the barrel, preventing external pressure from affecting the barrel's harmonics and thus improving shot-to-shot consistency and accuracy.

Are the Krebs Custom prototype rifles available for purchase?

The video explicitly states that these are early prototype/proof-of-concept firearms and are not available for sale, indicating they are for testing and development purposes.

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